X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=mm%2Fhighmem.c;h=be8f8d36a8b9b6919f4d1c36e1b3b3e973b242f1;hb=8dab5241d06bfc9ee141ea78c56cde5070d7460d;hp=51e1c1995fec1d87a1e8e80d4518008d4ec4f4f1;hpb=60f29b1e1600d89aee5e529acb4b276a6650cb8b;p=linux-2.6

diff --git a/mm/highmem.c b/mm/highmem.c
index 51e1c1995f..be8f8d36a8 100644
--- a/mm/highmem.c
+++ b/mm/highmem.c
@@ -99,6 +99,15 @@ static void flush_all_zero_pkmaps(void)
 	flush_tlb_kernel_range(PKMAP_ADDR(0), PKMAP_ADDR(LAST_PKMAP));
 }
 
+/* Flush all unused kmap mappings in order to remove stray
+   mappings. */
+void kmap_flush_unused(void)
+{
+	spin_lock(&kmap_lock);
+	flush_all_zero_pkmaps();
+	spin_unlock(&kmap_lock);
+}
+
 static inline unsigned long map_new_virtual(struct page *page)
 {
 	unsigned long vaddr;